<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			a{
				display: block;
				text-decoration: none;
				line-height: 50px;
				width: 200px;
				height: 50px;
				padding: 10px;
				margin: 10px;
			}
			a::link{
				color: yellow;	
			}
			a:visited{
				color: red;
			}
			a:hover{
				color: green;
			}
			a:active{
				color: hotpink;
			}
			
		</style>
	</head>
	<body>
		<a href="https://www.baidu.com">百度一下</a>
	</body>
</html>
